[Bug 513921] Re: keys for adjusting display brightness don't work as expected on ASUS 1005p netbook

[Rolf Leggewie]

I tried to do some triaging in line with what's written on
https://wiki.ubuntu.com/Hotkeys/Troubleshooting

First, I can confirm incade's findings that changing the brightness with
the hotkey combination did change the display brightness just the same
as the Power Management applet.  But, to my surprise, only the applet
changed the value in /sys/class/backlight/acpi_video0/*brightness or
/proc/acpi/video/VGA/LCDD/brightness.  The hot key combination changed
the display's brightness but did not affect /sys or /proc it seems.

On to the xev test.  I had to "killall gnome-settings-daemon gnome-
power-manager" and then went on to run xev from the command line with
the given arguments.  There never were any key events recorded (assuming
the sed statement in the wiki is correct).  Following the instructions
in /usr/share/doc/udev/README.keymap.txt up to step 3 did not produce
any keycode with /lib/udev/keymap. acpi_listen finally gave me an
output: "hotkey ATKD 0000002d 0000000c" for the hotkey to lower screen
brightness and "hotkey ATKD 0000002e 0000000c" for increasing it.

-> moving over to kernel bugs.

** Project changed: netbook-remix => linux

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keys for adjusting display brightness don't work as expected on ASUS 1005p netbook
https://bugs.launchpad.net/bugs/513921
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